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Granny Annexe Advice, Ideas & Guides

Expert advice on granny annexe design, planning, costs, construction and creating the right garden home for your family.

Whether you’re researching your first granny annexe or comparing designs, costs and construction methods, our guides are here to help. Explore practical advice on planning permission, the Caravan Act, SIPs construction, energy efficiency, pricing and bespoke annexe design.

You’ll also find inspiration from our experience designing and building garden annexes for families, along with straightforward answers to some of the most common questions we’re asked.

 

Garden room built by The Green Room for Alan Titchmarsh's Love Your Home & Garden in Eltham

Alan Titchmarsh’s Love Your Home & Garden – Our Eltham Garden Room

When ITV’s Love Your Home & Garden invited The Green Room to contribute to the programme in 2017, we had the opportunity to create a garden room with a very special purpose. For the Eltham transformation in Series 1, Episode 2, we donated and installed a bespoke garden studio for Manisha. The studio gave her […]
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Steel Grey flat-roof annexe with Anthracite Grey French doors and trellis screen, external view

The Eco Story Built Into Every Annexe

When choosing a garden annexe, most people ask the obvious questions: How big will it be? How much will it cost? And how quickly can it be built? However, the materials and construction methods behind eco-friendly garden annexes are just as important when considering energy efficiency, durability and environmental impact. Fewer people ask what goes […]
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John watching the birds feed outside his garden annexe

Granny Annexe vs Care Home: Our Family’s Experience

We know from personal experience the dilemma families can face when an elderly parent needs extra support. From illness and mobility issues to loneliness and changing care needs, there can be many factors to consider. When an Elderly Parent Needs More Support In our case, Mum passed suddenly and without warning. Dad had chronic health […]
Read Our Granny Annexe vs Care Home Story
Map showing over 100 Green Room garden annexes installed across 37 counties and areas in England and Wales.

Can a SIPs Granny Annexe Get a Lawful Development Certificate?

Over 100 SIPs Annexe Approvals Later, the “Movability” Myth Still Won’t Die You may have seen claims online that SIPs (Structural Insulated Panel) granny annexes cannot obtain a Lawful Development Certificate (LDC) because their construction makes it difficult to demonstrate that the annexe can move from one place to another. Our experience shows otherwise. Since […]
Can a SIPs granny annexe meet the movability test? Discover how we’ve secured more than 100 LDC approvals for SIPs-built annexes.
Infographic showing the Garden Annexe U-Values by The Green Room

Garden Annexe U-Values Explained

When people picture a garden annexe, they tend to picture the finished space: the flooring, the kitchen, the furniture and the view out over the garden. What they don’t see is the carefully designed construction behind the walls, beneath the floor and above the ceiling. Yet this build-up plays a major part in determining whether […]
Explore Garden Annexe U-Values
SIPs panel construction of a Green Room granny annexe, showing timber wall panels and floor deck installed on site before cladding.

What Is the Best Construction Method for a Granny Annexe?

The construction method used to build a granny annexe affects everything from energy efficiency and build time to long-term maintenance, durability and comfort. Choosing the right system can also influence the amount of disruption during installation and the usable living space inside the finished annexe. In the UK, granny annexes are commonly built using Structural […]
Read our guide to garden annexe construction methods
Grey weatherboard granny annexe with ramped decked entrance

What Makes the Best Granny Annexe?

Choosing a granny annexe is a significant investment, so it is worth looking beyond appearance and headline price. The best granny annexes combine thoughtful design, quality construction, energy efficiency and a specification that makes them comfortable for year-round living. Just as importantly, the company behind the annexe should provide clear pricing, experienced installation and support […]
Read how to choose the best granny annexe for your family
Infographic comparing the Caravan Act route and full planning permission for granny annexes, by The Green Room

The Caravan Act and Granny Annexes: Complete UK Guide

The Caravan Act can allow you to site a qualifying granny annexe within the garden of a main house without full planning permission. To qualify, the annexe must meet specific size, construction and transportability criteria. Its location and use also matter, and the annexe must remain ancillary to the main dwelling. Not every granny annexe […]
Read our full guide to the caravan act and granny annexes
Infographic titled 'Lowest Price vs Best Value' from The Green Room, comparing low-price and best-value granny annexe quotes.

How to Compare Granny Annexe Quotes Like-for-Like

How to Compare Granny Annexe Quotes Choosing a granny annexe can feel overwhelming. With so many companies offering different construction methods, specifications and pricing structures, knowing where to start isn’t always easy. Requesting several quotations is an important first step, but the lowest price doesn’t always represent the best value. Some quotations exclude essential work, […]
Read our guide to comparing granny annexe quotes.
garden annexe kitchen you can live in

Bespoke vs Standard Granny Annexes: Which Is Right for You?

No two families are the same, and neither are their gardens. While a standard garden annexe can provide a good starting point, a bespoke granny annexe design gives you the flexibility to create a home that suits your available space, lifestyle and future needs. A tailored layout makes better use of your garden and creates […]
Compare Bespoke & Standard Annexes

Get in Touch with The Green Room

Our team of down-to-earth experts genuinely care about great garden spaces and excellent customer service. Whether you’re just starting to explore your options or ready to move forward with your project, we’re here to help.

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